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CLASS A
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Type:
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Gas Supergiant
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Size:
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140,000km - 10,000,000km
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Description:
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Usually found in a star's outer or "cold zone." They have high core temperatures causing them to radiate heat. Low stellar radiation and
high planet gravity enables them to keep a tenuous surface comprised of gaseous hydrogen and hydrogen compounds.
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CLASS B
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Type:
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Gas Giant
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Size:
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50,000km - 140,000km
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Description:
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Usually found in a star's outer or "cold zone." They have high core temperatures, but do not radiate much heat. Low stellar radiation and
high planet gravity enables them to keep a tenuous surface comprised of gaseous hydrogen and hydrogen compounds.
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CLASS C
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Type:
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Reducing
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Size:
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10,000km - 15,000km
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Description:
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Usually found in a star's "habitable zone." They have high surface temperatures due to the "greenhouse effect" caused by their
dense atmospheres. The only water found is in vapor form.
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CLASS D
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Type:
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Geo-Plastic
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Size:
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10,000km - 15,000km
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Description:
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Usually have a molten surface because they have been recently formed. The atmosphere contains many hydrogen compounds and reactive gases. Class D
planets eventually cool, becoming Class E.
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CLASS E
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Type:
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Geo-Metallic
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Size:
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10,000km - 15,000km
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Description:
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Usually found in a star's "habitable zone." Their atmospheres still contain hydrogen compounds. They will cool further eventually becoming
Class F.
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CLASS F
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Type:
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Geo-Crystaline
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Size:
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10,000km - 15,000km
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Description:
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Usually found in a star's "habitable zone." They have surfaces that are still crystalizing. Their atmospheres still contain some toxic
gases. They will cool eventually becoming Class C, M or N.
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CLASS G
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Type:
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Desert
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Size:
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8,000km - 15,000km
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Description:
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Can be found in any of a star's zones. Their surfaces are usually hot and their atmospheres may contain heavy gases and metal vapors.
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CLASS H
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Type:
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Geo-Thermal
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Size:
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1,000km - 10,000km
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Description:
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Usually found in a star's "habitable zone" or "cold zone." They have partially molten surfaces and atmospheres that contain many
hydrogen compounds. They cool becoming Class L.
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CLASS I
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Type:
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Asteroid
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Size:
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100km - 1,000km
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Description:
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Planetary bodies of this class can be found in any of a star's zones. They are usually found in orbit of larger planets or in asteriod fields. They
have no atmospheres. Their surfaces are barren and cratered.
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CLASS J
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Type:
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Geo-Morteus
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Size:
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100km - 1,000km
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Description:
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Usually found in a star's "hot zone." They have high surface temperatures due to the proximty to the star. Their atmospheres are extremely
tenuous with few chemically active gases.
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CLASS K
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Type:
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Adaptable
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Size:
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5,000km - 10,000km
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Description:
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Usually found in a star's "habitable zone." They are adaptable for humanoid colonization through the use of pressure domes and other life
support devices. They have thin atmospheres. Small amounts of water are present.
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CLASS L
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Type:
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Geo-Inactive
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Size:
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1,000km - 10,000km
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Description:
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Usually found in a star's "habitable zone" or "cold zone." Low solar radiation and minimal internal heat usually result in a
frozen atmosphere.
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CLASS M
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Type:
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Terrestrial
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Size:
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10,000km - 15,000km
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Description:
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Found in a star's "habitable zone." They have atmospheres that contain oxygen and nitrogen. Water and life-forms are typically abundant. If
water covers more than 97% of the surface, then they are considered class N.
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CLASS N
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Type:
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Pelagic
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Size:
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10,000km - 15,000km
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Description:
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Usually found in a star's "habitable zone." They have atmospheres that contain oxygen and nitrogen. Water and life-forms are typically
abundant. If water covers less than 97% of the surface, then they are considered class M.
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CLASS S
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Type:
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Near Star
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Size:
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50,000,000km - 120,000,000km
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Description:
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Usually found in a star's "cold zone." They have high core temperatures causing them to radiate heat and light. These are the largest
possible planets, because most planetary bodies that reach this size do become stars.
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CLASS T
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Type:
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Ultra Giant
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Size:
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10,000,000km - 50,000,000km
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Description:
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Usually found in a star's "cold zone." They have high core temperatures causing them to radiate enough heat to keep water in a liquid state.
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CLASS Y
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Type:
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Demon
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Size:
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10,000km - 15,000km
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Description:
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Demon Planets and planetoids of this class can be found in any of a star's zones. Atmospheric conditions are often turbulent and saturated with
poisonous chemicals and thermionic radiation. Surface temperatures can reach in excess of 500 K. Communication is frequently impossible, and transport may
be difficult. Simply entering orbit is a dangerous prospect. No known environment is less hospitable to humanoid life than a Class Y planetary body.
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CLASS 9
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Type:
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K'Tal Class
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Size:
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10,000km - 15,000km
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Description:
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Pre-Federation classification. Out of the four gas giants in Sol, none are Class 9. Klingon designation: (ENT: "Sleeping Dogs")
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